Thanks let's try that The Company one also.No, there's no further content. The dev hasn't setup a sandbox mode for the ending yet either.
Speaking of Tiplick, the game The Company has a similar narrative structure to this one, but also isn't finished yet. Rather than just dead ending the game though, The Company just warns you the current story is over and then lets you play for as long as you wish. With each new update, any save beyond that end date will get set back to it for those that want to pick up where they left off.